Forces and Motion

What is the force that opposes the motion of an object?

• friction

• inertia

• gravity

• velocity

What is the force that pulls objects towards the center of the Earth?

• magnetism

• friction

• wind

• gravity

What is the force that causes two objects to attract or repel each other?

• frictional force

• gravitational force

• nuclear force

• electromagnetic force

Which type of friction occurs when an object moves through a fluid?

• Air friction

• Static friction

• Solid friction

• Fluid friction

What is the force that keeps the planets in orbit around the sun?

• Magnetic force

• Gravitational force

• Centrifugal force

• Frictional force

Which type of friction occurs when an object is not moving?

• Dynamic friction

• Static friction

• Kinetic friction

• Sliding friction

What is the unit of measurement for force?

• Newton (N)

• Joule (J)

• Kilogram (kg)

• Meters per second (m/s)

What is the force that allows a magnet to attract certain materials?

• friction

• electricity

• gravity

• magnetism

What is the force that slows down a moving object when it comes into contact with another surface?

• Friction

• Inertia

• Gravity

• Acceleration

What is the force that allows a magnet to repel certain materials?

• friction force

• gravity force

• electrical force

• magnetic force